Loops/Downward for
< Loops
Loops/Downward for
You are encouraged to solve this task according to the task description, using any language you may know.
You are encouraged to solve this task according to the task description, using any language you may know.
Write a for loop which writes a countdown from 10 to 0.
Ada
<ada> for I in reverse 0..10 loop
Put_Line(Integer'Image(I));
end loop; </ada>
C++
<cpp> for(int i = 10; i >= 0; --i)
std::cout << i << "\n";
</cpp>
Forth
Unlike the incrementing 10 0 DO-LOOP, this will print eleven numbers. The LOOP words detect crossing the floor of the end limit.
: loop-down 0 10 do i . -1 +loop ;
Java
<java>for(i = 10; i >= 0; --i){
System.out.println(i);
}</java>
JavaScript
<javascript>for (var i=10; i>=0; --i) print(i);</javascript>
Logo
If the limit is less than the start, then FOR decrements the control variable. Otherwise, a fourth parameter could be given as a custom increment.
for [i 10 0] [print :i]
MAXScript
for i in 10 to 0 by -1 do print i
OCaml
<ocaml>for i = 10 downto 0 do
Printf.printf "%d\n" i
done</ocaml>
Pascal
<pascal> for i := 10 downto 0 do
writeln(i);
</pascal>
Perl
<perl>foreach (reverse 0..10) {
print "$_\n";
}</perl>
Python
<python> for i in xrange(10, -1, -1):
print i
</python>
UnixPipes
yes \ |cat -n |head -n 10 | tac